feat: Add OperationHandler for PATCH

test/unit/ldp/operations/SimplePatchOperationHandler.test.ts

@@ -0,0 +1,24 @@
+import { Operation } from '../../../../src/ldp/operations/Operation';
+import { ResourceStore } from '../../../../src/storage/ResourceStore';
+import { SimplePatchOperationHandler } from '../../../../src/ldp/operations/SimplePatchOperationHandler';
+import { UnsupportedHttpError } from '../../../../src/util/errors/UnsupportedHttpError';
+
+describe('A SimplePatchOperationHandler', (): void => {
+  const store = {} as unknown as ResourceStore;
+  const handler = new SimplePatchOperationHandler(store);
+  beforeEach(async(): Promise<void> => {
+    store.modifyResource = jest.fn(async(): Promise<void> => undefined);
+  });
+
+  it('only supports GET operations.', async(): Promise<void> => {
+    await expect(handler.canHandle({ method: 'PATCH' } as Operation)).resolves.toBeUndefined();
+    await expect(handler.canHandle({ method: 'GET' } as Operation)).rejects.toThrow(UnsupportedHttpError);
+  });
+
+  it('deletes the resource from the store and returns its identifier.', async(): Promise<void> => {
+    await expect(handler.handle({ target: { path: 'url' }, body: { dataType: 'patch' }} as Operation))
+      .resolves.toEqual({ identifier: { path: 'url' }});
+    expect(store.modifyResource).toHaveBeenCalledTimes(1);
+    expect(store.modifyResource).toHaveBeenLastCalledWith({ path: 'url' }, { dataType: 'patch' });
+  });
+});